An evergreen tree, up to 25 m tall. Leaves lanceolate, crowded at apices of glabrous twigs, 4.5—20 cm x 1.2—5 cm, base decurrent, apex obtuse to slightly acuminate, petiole 0.2—4 cm long; raceme in between the leaves, pendulous, 2—10 cm long, lax, 4—6-flowered, pedicel 2.5 cm long; sepals lanceolate, 1.2—2.5 cm x 0.2 cm long, bright red, petals obovate, 2—2.5 cm x 1 cm, pure white, stamens 25—60, filaments 2—4 mm long, anthers 2.5—6 mm long, with a 2.5—4 mm long awn, ovary densely pubescent, 2-celled. Drupe ellipsoid, 2.5—4 cm x 1.5—2 cm, acuminate, pale green, stone covered with recurved, long, slender spines.

Diuretic (seeds)

PROSEA (Plant Resources of South-East Asia) Foundation

Used for poulticing persistent ulcers and for treating women's diseases (crushed bark); against syphilis (leaves); for bilious afflictions (decoction of leaves); to relieve bladder stones and painful urination (seeds).